Environmental Engineering Reference
In-Depth Information
Figure 8. The data acquisition system (DAS).
The items of data shown in table 3 are transferred to the computer through an RS-232C
interface to the control room computer to be processed. The results of the mean of four 15-
minute data values are displayed every hour on the CRT in the control room. The following
hourly values are displayed on the CRT:
Climatic temperature (
o
C)
•
Solar radiation (kcal/m
2
hr)
•
•
Heat consumption (kcal/kg dist.)
OHTC of heater (first effect) (kcal/m
2
hr
o
C)
•
Seawater flow (m
3
/hr)
•
•
Seawater TDS (ppm)
Seawater inlet temp. (
o
C)
•
Seawater outlet temp. (
o
C)
•
•
Heat collected by block F (kcal/hr)
•
Heat collected by block A (kcal/hr)
Heat collecting pump flow rate (m
3
/hr)
•
Heat accumulator inlet temp. (
o
C)
•
Heat accumulator outlet temp. (
o
C)
•
Heating water inlet temp. to evaporator (
o
C)
•
Heating water return temp. from evaporator (
o
C)
•
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